(一) 概述郑州工务修配厂从1971年开始酝酿到1979年设计试制,经过近十年时间,于1980年试制出两台220马力液力传动轨道车。其传动系统如图1所示,计算轮周牵引力及阻力曲线如图2所示。按计算,轨道车应能起动300吨左右重车,但试运转表明,起动牵引力仅为设计值的30～40%,有时甚至连50吨也拉不动,以至于动车都有困难;最高速度也未达到设计要 (A) Overview Zhengzhou Works fitting plant brewing from 1971 to 1979 trial design, after nearly a decade, in 1980 trial two 220 horsepower hydraulic transmission rail car. The transmission system shown in Figure 1, calculate the wheel circumference traction and resistance curve shown in Figure 2. According to calculation, the rail car should be able to start about 300 tons of heavy vehicles, but the test run shows that the starting traction is only 30 ~ 40% of the design value, and sometimes even 50 tons are not fixed, so that the motor car has difficulties; the maximum speed Did not meet the design